Railway rolling stock

ABSTRACT

A car body  8  is supported on a bogie frame  4  through an air spring  5.  Along to a width direction of the car body  8,  to the bogie frame  4  a torsion bar  11  is provided. At both ends of the torsion bar  11,  links  15  and  15  for inclining to direct for an inner side of the car body  8  through levers  13  and  13  are provided. Accordingly, a rolling displacement of the both ends of the car body is restricted and an upper and lower displacement in the same phase is not restricted. According to an occurrence of an excess centrifugal acceleration which acts on the car body  8,  a car body inclination according to a link mechanism can be operated. For this reason, a light weight structure and a low cost structure can be attained. An inclination device having a light weight structure, a left and right riding good feeling in the passenger in a car, and a high fail-safe characteristic can be obtained. An inclination device having a light weight structure, a left and right riding good feeling in the passenger in a car, and a high fail-safe characteristic can be obtained.

BACKGROUND OF THE INVENTION

[0001] 1. Technical Field

[0002] The present invention relates to a railway rolling stock andrelates to a device for inclining a car body to improve a riding feelingduring a curvature passage running time in the railway rolling stock.

[0003] 2. Prior Art

[0004] As a car body inclination device in a railway rolling stock, asshown in Japanese application patent laid-open publication No. Hei6-56034, the car body inclination device is one in which a torsion baris used. The car body inclination device comprises a first torsion barwhich is provided in a left and right direction of the car body, asecond torsion bar which is provided respectively on both ends thereof,an actuator for connecting respectively each end of the first torsionbar and one end of the second torsion bar, and a rod for connectinganother end of the second torsion and the car body. The actuator isinstalled in a front and rear direction of the car body. By theexpanding and contracting of the actuator, and the rod is moved an upperand down direction, as a result, the car body is inclined.

[0005] According to the above stated car body inclination constructionin the railway rolling stock, the gravity of the car body is moved in aninner side of the curvature passage, an increase of the force added tothe car wheels at an outside of the curvature passage can be preventedand the safety can be attained.

[0006] As another prior art relating to a car body inclinationconstruction in a railway rolling stock, a torsion bar is provided on abogie frame is provided along to along to a width direction of thebogie, through a lever at both end portions of the torsion bar and alink the torsion bar is connected to the car body. The link is notsubstantially inclined against the bogie and the car body. This car bodyinclination construction is used to restrain a rolling phenomenon of thecar body.

[0007] According to Japanese application patent laid-open publicationNo. Hei 6-56034, the increase of the force added to the car wheels at anoutside of the curvature passage can be prevented and the safety can beattained.

[0008] However, it is necessary to provide the three torsion bars andthe two actuators and the link for necessary to connect the torsion barsand the actuators, the construction becomes the complex one and thisinvites high cost structure.

[0009] Further, according to the actuators, since the car body isinclined, it is necessary to take fully into consideration about anabnormality of the controlling system.

SUMMARY OF THE INVENTION

[0010] An object of the present invention is to provide a railwayrolling stock wherein a car body inclination device having a simpleconstruction can be obtained.

[0011] Another object of the present invention is to provide a railwayrolling stock wherein a car body inclination device having a lightweight structure can be attained.

[0012] A further object of the present invention is to provide a railwayrolling stock wherein a car body inclination device having a left andright riding good feeling can be obtained.

[0013] A further object of the present invention is to provide a railwayrolling stock wherein a car body inclination device having a highfail-safe characteristic can be attained.

[0014] According to the prevent invention a railway rolling stock,characterized in that a torsion bar is installed to a bogie or a carbody along to a width direction of the bogie, at both ends of thetorsion bar respective levers is provided, between the car body and thebogie to which the torsion bar is not installed and an end portion ofthe respective levers are connected together with a link, a firstdistance from a connection point between one of the link and the leverto a connection point between another link and the lever is larger thana second distance from a connection point between another end of thelink and the car body or the bogie and a connection point betweenanother link and the car body and the bogie, and the first distance isformed in a side of the bogie and the second distance is formed in aside of the car body.

[0015] According to the present invention, in accordance with the actionof the excess centrifugal acceleration, it can obtain the free pendulumand the car body inclination device having the high fail-safecharacteristic can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS

[0016]FIG. 1 is a front view showing an inclination device of a car bodyof a railway rolling stock one embodiment according to the presentinvention;

[0017]FIG. 2 is a front view of an essential part of FIG. 1;

[0018]FIG. 3 is a front view showing a condition in which the car bodyis inclined in FIG. 2;

[0019]FIG. 4 is a right side view of FIG. 2;

[0020]FIG. 5 is v-V cross-sectional view of FIG. 4;

[0021]FIG. 6 is VI-VI cross-sectional view of FIG. 4;

[0022]FIG. 7 is a side cross-sectional view showing a car bodyinclination device of a railway rolling stock of another embodimentaccording to the present invention;

[0023]FIG. 8 is a front view showing a car body inclination device of arailway rolling stock of a further embodiment according to the presentinvention; and

[0024]FIG. 9 is a front view showing a car body inclination device of arailway rolling stock of a further embodiment according to the presentinvention.

DESCRIPTION OF THE INVENTION

[0025] A car body inclination device of a railway rolling stock of oneembodiment according to the present invention will be explainedreferring to form FIG. 1 to FIG. 6. FIG. 6 show only a left half partbut omits a right half part. Wheel axles 2 having car wheels 1 are fixedto a bogie frame 4 through an axle spring member 3. A lower face of acar body 8 is supported through an air spring member 5 which is mountedon the bogie frame 4. At the lower face of the car body 8 a center pinis provided and this center pin is connected to the bogie frame 4through a traction device. To each of bogies 7, a following constructionis installed.

[0026] A torsion bar 11 is installed rotatably freely to a vicinity ofan upper portion of the bogie frame 4 along to a width direction (arectangular direction of a running direction) of the bogie 7. Both endsof the torsion bar 11 are installed to the bogie frame 4 through bearingmembers 12. The bearing member 12 is fixed to the bogie frame 4 throughrubber seats etc.. The bearing member 12 is a thrust bearing member. Toboth ends of the torsion bar 11, levers 13 and 13 which project in aradial direction are arranged. The torsion bar 11 and the lever 13 areconnected through an involute gear shape mechanism. The levers 13 and 13and the links 15 and 15 are connected through pins. Another end of thelinks 15 and 15 and a lower face of the brackets 17 and 17 are connectedthrough pins.

[0027] A distance L1 from a connection point between the lever 13 at theone end of the torsion bar 11 and the link 15 to a connection pointbetween the lever 13 at the another end of the torsion bar 11 and thelink 15 is larger than a distance L2 between from a connection pointbetween the one link 15 and the bracket 17 of the car body 8 to aconnection point between the other link 15 and the bracket 17 of the carbody 8. In other words, the links 15 and 15 are installed in an innerside of the car body 8. The link 15 is installed incliningly with anangle against a horizontal face. The angle is about from 50 degrees to80 agrees. Preferably, the angle is 60 degrees.

[0028] When the car body 8 is inclined, the respective angles of therespective links 15 and 15 is varied. According to this, the link 15 isformed to rotate the lever 13. The rotation direction of the link 15 andthe rotation direction of the lever 13 are substantially orthogonal. Forthis reason, the link 15 is connected to the lever 13 through the rubberbush member or a spherical face bearing member. Further, the link 15 andthe car body 8 are connected by a spherical face bearing member.

[0029] To the lower face of the car body 8, a stopper 21 is lifted down.To oppose to this stopper 21, stoppers 22 and 22 in a side of the bogie7 are projected to an upper side portion from the bogie frame 4. Thestopper 22 is arranged in both sides (the both sides of the car body 8in the width direction). In commonly, between the stopper 21 and thestoppers 22 and 22, a predetermined space is established.

[0030] Further, the stopper 21, and the stoppers 22 and 22 can beemployed the members of the already provided. From the connection membersuch as a center pin from the car body 8 is lifted down. A lower end ofthe connection member and the bogie frame 4 are connected with the linkwhich is along to the running direction. This center pin can work as arole of the stopper 21.

[0031] An intersection point P of an extension line of the links 15 and15 under the condition in which a car body 6 is not inclined is a centerof the inclination of the car body 6. The extension line of the links 15and 15 during the inclination time is not arranged to the intersectionpoint P. The center of the car body 6 passes through the intersectionpoint P. A gravity G of the car body 6 is arranged in the lower portionof the intersection point P.

[0032] With the above stated construction, in a case where the rollingstock runs a linear interval, it will be shown under the condition shownin FIG. 2. To the upper and lower movement of the bogie 7, the change ofthe inclination angle of the links 15 and 15 is substantially the same.For this reason, the torsion bar 11 can rotate, to the torsion bar 11the twist is not generated. Accordingly, the upper and lower movement ofthe bogie 7 can be permitted. In other words, the air spring 5 can beoperated. As a result, the upper and lower displacement of the samephase at the both ends of the car body is not restricted, but a rollingdisplacement at the both ends of the car body is restricted.

[0033] The inclination motion of the car body during the curvaturepassage running time will be explained. To the curvature portion, a cantangle CO is provided. According to the cant angle CO, the curvatureradius, and the running speed, the excess centrifugal acceleration aredetermined. In this time, in accompany with the increase of the runningspeed in the curvature passage, the excess centrifugal accelerationincreases also, to the passenger the acceleration in the left and rightgenerates, the left and right riding feeling will be bad. The left andright ordinary acceleration degree is 0.08 g as a rough standard valueof a left and right normal acceleration.

[0034] When the rolling stock urns more than a balancing speed which isdetermined by the cant angle CO, the curvature radius and the runningspeed, as shown in FIG. 3, according to the excess centrifugalacceleration, the car body 8 moves in the outer side of the curvaturepassage. A center position of the car body 8 is moved from a point A toa point A′. The gravity of the car body moves from the point G to apoint G′. The movement of the car body 8 is stopped by the contact tothe stoppers 21 and 22. According to the links 15 and 15 the car body 8is inclined. The inclination angle of the link 15 in the inner sidebecomes and the inclination angle of the link 15 in the outer sidebecomes . The inclination angle of the car body 8 becomes . Since thecar body 8 is inclined by the movement in the width direction, as aresult the smooth inclination can be obtained.

[0035] According to the above stated construction, the upper and lowermovement of the bogie 7 can be permitted, according to the excesscentrifugal acceleration the inclination of the car body 8 can bepermitted. Further, the constitution members are the torsion bar 11, thebearing members 12 and 12, the levers 13 and 13, and the links 15 and15. It is unnecessary to provide an actuator for inclining the car body8. For this reason, the construction of the inclination device can beformed easily, the construction can be formed with a light weightstructure and a low cost structure. Further, it is possible to form theinclination of the car body in response to the curvature passage andfurther by corresponding the excess centrifugal acceleration since theinclination motion is carried out, accordingly the inclination devicehaving the high fail-safe characteristic can be attained.

[0036] When the excess centrifugal acceleration is fallen away, sincethe twist, etc., which are given to the left and right air springs 5 and5 during the inclination time, are fallen away, the restoring force canbe obtained, as a result the car body 8 can return smoothly from theinclination condition.

[0037] When the rolling stock runs the curvature passage, the levelingadjustment function for adjusting the height of the air springs 5 and 5using the leveling adjustment valve for setting constant the height ofthe air springs 5 and 5 is formed to stop.

[0038] An embodiment shown in FIG. 7 according to the present inventionwill be explained. In this figure, the same reference numerals shown inthe above stated embodiment indicate the same members. The differencebetween this embodiment and the above stated embodiment is thatactuators 30 and 30 are installed in a midway of the links 15 and 15.Accordingly, the link 15 can be expanded and contracted freely. Acontrol device is formed to retard a rod of the actuator 30 which isarranged an inner side of the curvature passage and the actuator 30arranged in an outer side is projected. As a result, a length of thelink 15 arranged in the inner side of the curvature passage becomesshort and a length of the link 15 arranged in the outer side of thecurvature passage becomes long.

[0039] According this construction, using the inclination target valuesexecuted under the basis of the curvature information which are storedin advance (the curvature radius, the cant angle CO, etc.) and therunning speed, the left and right displacement between the bogie 7 andthe car body 8 or an actual measured left and right vibrationacceleration which is installed to the car body floor face and the bogieframe 4 and the inclination angle, the actuators 30 and 30 can beexpanded and contracted. Accordingly, even when the movement amount islittle, the car body can be inclined smoothly. Further it is possible tocarry out a preview control.

[0040] When according to a malfunction of the control device a reverseinclination command is outputted and the car body 8 is formed toinclined in a reverse direction, since the car body is reversed to anatural inclination according to the link 15 etc., it is difficult tocarry out the inclination in the reverse direction, as a result afail-safe characteristic can be obtained easily.

[0041] According to the failure of the actuators 30 and 30 and thecontrol device, when the expansion and the contraction of the actuators30 and 30 are not carried out, it presents the embodiment shown in FIG.1, as a result the car body 8 can be inclined according to the excesscentrifugal acceleration.

[0042] Using a detection means for detecting the expansion amount andthe contraction amount of the actuator 30, this detected value isfeed-backed and is made to be a control amount, and then the inclinationmotion can be carried out smoothly. Further, as the actuator 30, a motorand a ball screw, and a mechanism of an air pressure system and ahydraulic pressure system can be employed.

[0043] When the cant Co is less than an assumed running speed, theactuators 30 and 30 can be expanded and contracted in the reversedirection.

[0044] An embodiment shown in FIG. 8 according to the present inventionwill be explained. In this figure, the same reference numerals shown inthe above stated embodiment shown in FIG. 1 indicate the same members.The difference between this embodiment and the above stated embodimentis that control devices 40L and 40R for controlling an inner pressure ofthe air spring 5 are installed. According this construction, with thecontrol devices 40L and 40R, similarly to the control device of theabove stated embodiment shown in FIG. 7, using the inclination targetvalues executed under the basis of the curvature information which arestored in advance (the curvature radius, the cant angle CO, etc.) andthe running speed, the left and right displacement between the bogie 7and the car body 8 or the actual measured left and right vibrationacceleration which is installed to the car body floor face and the bogieframe 4 and the inclination angle, the air springs 5 and 5 can beexpanded and contracted.

[0045] With the above stated construction, according to the controldevices 40L and 40R for controlling the air spring 5, the inclinationaction according to the link 15 etc. and the expansion and thecontraction of the air spring 5 can be operated at the same time, as aresult the inclination motion of the car body 8 can be carried outsmoothly.

[0046] When according to a malfunction of the control devices 40L and40R, a reverse inclination command is outputted and the car body 8 ismade to inclined in a reverse direction, since the car body 8 isreversed to a natural inclination according to the link 15 etc., it isdifficult to carry out the inclination in the reverse direction, as aresult the fail-safe characteristic can be obtained easily.

[0047] When the expansion amount and the contraction amount or the innerpressure etc. of the air springs 5 and 5 are detected, and the detectedvalues are made to feed-back, then it is possible to carry out a goodinclination operation.

[0048] Further, during the car body inclination time, when the levelingadjustment function of the air springs 5 and 5 according to the levelingadjustment valve is made to stop, it is unnecessary to perform theleveling adjustment according to the supply and the discharge of the airto the air springs 5 and 5, then it is possible to carry out the goodinclination motion.

[0049] When the cant Co is less than assumed running speed, the airsprings 5 and 5 can be expanded and contracted in the reverse direction.

[0050] An embodiment shown in FIG. 9 according to the present inventionwill be explained. In this figure, the same reference numerals shown inthe above stated embodiment shown in FIG. 1 indicate the same members.The difference between this embodiment and the above stated embodimentshown in FIG. 1 is that between the stopper 21 and the bogie frame 4 anactuator 50 for expanding and contracting in the width direction of thecar body 8 and a control device 51 for controlling the actuator areinstalled. According this construction, with the control device 51,similarly to the control device of the above stated embodiment shown inFIG. 7, using the inclination target values executed under the basis ofthe curvature information which are stored in advance (the curvatureradius, the cant angle CO, etc.) and the running speed, the left andright displacement between the bogie 7 and the car body 8 or the actualmeasured left and right vibration acceleration which is installed to thecar body floor face and the bogie frame 4 and the inclination angle, asa result the actuator 50 can be expanded and contracted.

[0051] With the above stated construction, a control for furtherassisting the inclination motion according to the link 15 can beobtained. Further, it is possible to carry out the preview controlsystem (for giving the inclination command this side of the curvaturepassage) for reducing a jerk acceleration (an angular acceleration) ofthe short curvature passage of the transmission curvature passage etc..

[0052] When the cant Co is less than the assumed running speed, theactuator 50 can be expanded and contracted in the reverse direction.

[0053] A technical range according to the present invention is notlimited to the wordings stated in the what is claimed is item and thewording stated in the means for solving the invention item but it willrefer to the range in which the person who belongs to this technicalfield.

[0054] According to the present invention, in accordance with thecombination of the torsion bar with the link, with the light weightstructure inclination mechanism, the left and right riding feeling forthe passenger can be secured, and further the inclination device havingthe high fail-safe characteristic can be attained.

What is claimed is:
 1. A railway rolling stock, characterized in that atorsion bar is installed to a bogie or a car body along to a widthdirection of said bogie; at both ends of said torsion bar a respectivelevers is provided; between said car body and said bogie to which saidtorsion bar is not installed and an end portion of said respective leverare connected together with a link; a first distance from a connectionpoint between one of said link and said lever to a connection pointbetween another link and said lever is larger than a second distancefrom a connection point between another end of said link and said carbody or said bogie and a connection point between another link and saidcar body and said bogie; and said first distance is formed in a side ofsaid bogie and said second distance is formed in a side of said carbody.
 2. A railway rolling stock according to claim 1, characterized inthat said torsion bar is installed to said bogie.
 3. A railway rollingstock according to claim 1, characterized in that between said car bodyand said bogie, said car body provides a stopper for regulating amovement to said width direction against said bogie.
 4. A railwayrolling stock according to claim 1, characterized in that when therailway rolling stock runs on a curvature passage with more than abalancing speed, a drive device for inclining said car body is provided;and in said drive device, a height from said bogie frame in an innerside of said curvature passage to said car body is lower than a heightfrom said bogie in a linear passage to said car body, and a level fromsaid bogie frame in an outer side of said curvature passage to said carbody is formed high.
 5. A railway rolling stock according to claim 4,characterized in that when the railway rolling stock runs on a curvaturepassage with less than a balancing speed; in said drive device, saidheight from said bogie frame in said inner side of said curvaturepassage to said car body is higher than said height from said bogie in alinear passage to said car body, and said height from said bogie framein said outer side of said curvature passage to said car body is formedlow.
 6. A railway rolling stock according to claim 4, characterized inthat a control device for controlling said drive device performs tofeed-back an expansion and contraction amount of said drive device.
 7. Arailway rolling stock according to claim 4, characterized in thatbetween said bogie and said car body, a respective air springs isinstalled in said width direction; and when the railway rolling stockruns with more than said balancing speed, a leveling adjustment functionfor said air springs according to a leveling adjustment valve is formedto stop.
 8. A railway rolling stock according to claim 4, characterizedin that as said drive device, an actuator for altering said length tosaid link is provided respectively; and a length of said actuator whichis positioned in said inner side of said curvature passage is formedshort, and a length of said actuator which is positioned in said outerside of said curvature passage is formed long.
 9. A railway rollingstock according to claim 4, characterized in that between said bogie andsaid car body, in said width direction, a respective air springs isinstalled; said drive device is said air spring; and the railway rollingstock runs with more than balancing speed on said curvature passage;said drive device is said air spring; and a control device is providedto form a height of said air spring which is positioned in said innerside of said curvature passage smaller than a height of said air springwhich is positioned in said outer side of said curvature passage.
 10. Arailway rolling stock according to claim 4, characterized in that assaid drive device, between said bogie and said car body, an actuator formoving said car is provided body in said width direction; and when therailway rolling stock runs on said curvature passage with more than abalancing speed, said actuator moves said connection point between saidactuator and said car body to an outer side of said curvature passage.11. A railway rolling stock according to claim 1, characterized in thata center pin provided projecting in a lower portion of said car body andsaid bogie are connected through a link; and in a width direction ofsaid car body, to said bogie at both sides of said center pin, a stopperfor contacting said center pin is installed.